Tube-bending machine



Aug. 119, 19%

.1. H. HAWES TUBE BENDING MACHINE Filed OCT.. l2

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Patented Aug. 19, 1924.

UNITED STATES JOHN HENRY HAWES, F LONDON, ENGLAND.

TUBE-BENDING MACHINE.

Applicatin filed Gctober 12, 1923.

To aZZ whom t may concern Be it known that I, JOHN HENRY Hawes,

a subject of the King of Great Britain,'

of 14 to 19 Tottenham Mews, Tottenham Street, London7 England, have invented a new and useful Improvement in or Relating tov Tube-Bending Machines, of which the following is a specification.

This invention relates to tube bending ma-,

chines and has for its object to provide an improved construction or modication of the tube bendingmachine described in my previous application for Patent Serial No. 623,470.

According to my said application the tube is bent around a radius wheel or former by means of a bending roller mounted on a lever and adapted to travel over the back of an intermediate shield through which the bending force is applied at a position yfrom 1 10O to 25o but preferably about 15 in ador the like may be placed to ascertain the correct position in relation to the tube to be bent or the. gauge may be provided with a sliding set square or projecting or folding arms for the same purpose.

The accompanying drawings show two constructions of the improved pipe bending machine,

Figure l is a plan,

Fig. 2 is a front elevation of Fig. l, andv Fig. 3 is a semi-diagrammatic plan view showing a modified construction.

In the construction shown in Figs. l and 2, a radial bifurcated lever e is employed fitted with a slide 7c which carries the bending roller f and is adapted to be adjusted longitudinally of the radial lever e by a screwed spindle Z which extends out through the handle end of the said lever and is provided with a milled head m or other suitable means by which it may be operated.

Serial No. 668,151.

The handle end of the radial lever e is preferably provided with an elongated boss n over which a tubular member o indicated in dotted lines may be placed to increase the length of the handle and secure the required leverage without using the screwed spindle Z as a handle for the larger sizes where considerable force is necessary.

Upon the face of the radial lever e is fitted a gauge consisting of a bar p having mounted thereon a sliding pointer or set square g the edge g of which nearest the radius wheel c is always at 90o with the gauge bar p. is a stud adapted to be fitted in one of a number of holes in the base plate and forming an abutment against which the length of pipe It preceding the bending point may bear. The said stud i is formed with a grooved side z" and one curved and grooved side 2.

The arrangement is such that when any of the set of radius wheels stops and shield are assembled with the pipe ZL to be bent in position, the radial lever e and bending roller f are adjusted by the screwed spindle Z until with the roller 7 in contact with the shield g the edge of the set square is parallel with the pipe Zz to be bent and the bending roller f will be in the before mentioned correct angular position to perform the bending operation on thin gauge tubes with efficiency and without injury to the same.

The sliding set square g on the gauge may be adapted to rotate about the gauge bar p so that it may be turned over to project on either side of the bar p as may be most convenient in use.

If desired, and according to a modified construction, the gauge may consist of a straight trued face placed at such an angle that a set square or the like placed against the face of the gauge may be used insteadv of the sliding square.

In the modified construction shown in Fig. 3, the set square g which slides on the gauge bar p is provided with two gauging edges Q Q2, and the machine is arranged so that the lever e may be used on the left hand side as well as the right hand side of the machine.

l/Vhen the lever is used to bend a tube by a forward movement on the righthand side of the machine as shown in full lines, the gauging face g is employed and when the lever is used on the left hand side of the llO former, a bending yroller mounted upon said lever, a screw device for adjusting the position 'of the bending roller longitudinally of `the lradial lever, an angular gauge mounted upon said radial 'lever and adapted to permit of the 'correct angular working `p osition for the bending rol-ler being quickly and accurately 'determined for the different sizes of tubes and radius wheels.

2. A tube bending machine of the kind refer-red to comprising the combination yof a rad-ius wheel or former and shield with coaeting faces grooved and proportioned to the tube to be bent, a bifurcated radial lever Iadapted rto turn on the vaxis of the radial wheel or former, a slide mounted in the bifureated end Iof said radial lever, a bending roller mounted on said slide a screwed spindle extendingl longitudinally through the handle of said radial lever and beyond the Aend thereof, fand serving to adjust :the position of the slide which vcarries the bend-ing roller, a gauge fitted upon the/radial lever and adapted to permit of the bending yroller being adjusted lby the screw so as to engage the pipe to be 'bent at the required angular positionin advance of 'the bending point.

- 3. A tube bending `machine ofthe kind referred to comprising the combination of a 'radius ywheel or former and shield with coaeting faces grooved and proportioned to the tube t0 be bent, a bifurcated radial lever adapted to turn on the axis of the radial wheel or former, aslide mounted in thebifurcated end of said radial lever, a bending roller ymounted on said slide a screwed spindle extending longitudinally through the handle of vsaid radial lever and beyond :the end thereof, and serving to adjust the position of the slide which carries the bending roller, a Vgauge bar fitted upon the upper face o-f'saidradial lever, `a lpointer lever adapted to lturn on Jche axis -of the radial wheel or former, `a islid'e 'mounted in the ybifurcated end of said radial flever, la bending roller mounted `on said slide, a screwed spindle 'extending longitudinally through the handle -of `said radial lever and beyond theyend thereof, tand vserving to 'adjust tlie ,position 4of the slide which car-ries the bending roller, a gauge bar fitted upon the upper lface 1o'f said radial lever, Ela pointer or set square adapted to slide ion said gauge bar, and hinged thereon so as to be turned `to project above or below said bar for the purpose of quickly determining the correct angular position Iof the bending roller lin advance of `the 'bending point and in relation to the [pipe to be bent.

A tu'be lbending' machine of the kind referred Ito conrprising the combination of a radius wheel or former, `and shield with coactin-g faces grooved Vand propontionedfto the tube to Ibe bent, a bifurcated radial lever adapted to turn Von the axis vof the radial wheel or former, 'aslide mounted in the bifurcated end `of 'said Iradial leven, a bending roller mounted 'on 'said 4slide Ja screwed spindle extending longitudinally through Ithe handle of said Iradial lever and beyond the 'end thereof, and lserving lto adjust the position of the slide which carries the bending roler, a gauge bar fitted 'upon the-upper face-ofsaidfradial lever, a .pointer or set square lmounted -on said gauge bar and adapted to slide thereon for 'the purpose of quickly `determining the lcorrect, angular Aposition o f the bending roller vin advance'of the bending point, two gauging edges on said .pointer or `set square yso arranged as to permit of 'the bending lever being used on the right lor left hand sides of the machine for bending a tube 'by lthe forward or backward Amovementy of .said lever.

JoHN HENRY nawn's.V 

